Fix screen corruption on older 32-bit systems using AGP chips. Partially
revert commit 33b3ad3788aba846fc8b9a065fe2685a0b64f713.
Cc: Mikhail Krylov <sqarert@xxxxxxxxx>
Cc: Alex Deucher <Alexander.Deucher@xxxxxxx>
Cc: Robin Murphy <robin.murphy@xxxxxxx>
Cc: Direct Rendering Infrastructure - Development <dri-devel@xxxxxxxxxxxxxxxxxxxxx>
Cc: AMD Graphics <amd-gfx@xxxxxxxxxxxxxxxxxxxxx>
Fixes: 33b3ad3788aba8 ("drm/radeon: handle PCIe root ports with addressing limitations")
Signed-off-by: Luben Tuikov <luben.tuikov@xxxxxxx>
---
drivers/gpu/drm/radeon/radeon.h | 1 +
drivers/gpu/drm/radeon/radeon_device.c | 2 +-
drivers/gpu/drm/radeon/radeon_ttm.c | 2 +-
3 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 37dec92339b16a..4fe38fd9be3267 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -2426,6 +2426,7 @@ struct radeon_device {
struct radeon_wb wb;
struct radeon_dummy_page dummy_page;
bool shutdown;
+ bool need_dma32;
bool need_swiotlb;
bool accel_working;
bool fastfb_working; /* IGP feature*/
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 6344454a772172..3643a3cfe061bd 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1370,7 +1370,7 @@ int radeon_device_init(struct radeon_device *rdev,
if (rdev->family == CHIP_CEDAR)
dma_bits = 32;
#endif
-
+ rdev->need_dma32 = dma_bits == 32;
r = dma_set_mask_and_coherent(&rdev->pdev->dev, DMA_BIT_MASK(dma_bits));
if (r) {
pr_warn("radeon: No suitable DMA available\n");
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index bdb4c0e0736ba2..3debaeb720d173 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -696,7 +696,7 @@ int radeon_ttm_init(struct radeon_device *rdev)
rdev->ddev->anon_inode->i_mapping,
rdev->ddev->vma_offset_manager,
rdev->need_swiotlb,
- dma_addressing_limited(&rdev->pdev->dev));
+ rdev->need_dma32);
if (r) {
DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
return r;
base-commit: 20e03e7f6e8efd42168db6d3fe044b804e0ede8f
--
2.39.0.rc2
